PRESENTED BY

GIGABIT ETHERNET PASSIVE OPTICAL

NETWORK(GEPON)

Assignment Group- 2013/17/52Batch- 2013/17 [11]

Tanmay KediaMonika Dubey

VenugopalSaptrishi Gupta

Khumeshwari Sahu

INDEX

FTTx Future of FTTH PON a Simple view Advantages of PON Based Networks Types of PON GEPON Overview Fundamentals of GEPON Comparison Of GEPON With Other Broadband

Access Technologies

FTTx TECHNOLOGYFTTX is of 4 types:

•FTTP: Fiber To The Premises FTTH-Fiber To The Home FTTB-Fiber To The Building•FTTB: Fiber To The Desktop•FTTC: Fiber To The Curb•FTTN: Fiber To The Node

WHY CHOOSE FIBER?

High Information Carrying Capacity Less Attenuation Greater Safety Immunity to -• Radio Interferences • Electromagnetic Interferences Higher Security Less Temperature Sensitive Small Size and Light weight No Cross Talk More Bandwidth – Thousands of Channels

FTTx

FTTP

FTTD

FTTN

FTTC

THE FTTH ACCESS NETWORK – OLTS IN THE CENTRAL OFFICE, ONUS IN CPES

FUTURE OF FTTH FTTH access networks will provide ample bandwidth for 5, 10 and even 20 years or more.

FTTH can redefine performance parameters to support future applications.

An example of this is support for Dynamic Bandwidth Allocation or DBA.

FTTH will provide different bandwidth priorities to subscribers so that different application service requirements can be supported. For example, it may be critical for high-definition IP TV to have priority download of a time-sequenced video frame and not so critical for a user accessing email. All GPON suppliers must have programmable DBA.

PON A SIMPLE VIEW•In a PON system, a single fiber connects multiple customers to a single transceiver at the central office (CO).

•The single fiber is split, using a Passive Optical Splitter, to serve up to 32 customers.

• Not only does PON reduce the amount of fiber required, but a single transceiver serves multiple customers instead of requiring one per customer.

WHAT IS PON ?

A Passive Optical Network (PON) is a point-to-multipoint, fiber to the premises network architecture in which unpowered optical splitters are used to enable a single optical fiber to serve multiple premises, typically 16-128.

Passive Optical Network facilitates another (higher bandwidth) broadband access technology that competes with and complements xDSL, cable modem and fixed wireless. With a PON, optical fiber is deployed either all the way or almost all the way to the end user (VDSL). It is called Passive Optical Network because:Network only consists of passive light transmission components (fiber links, splitters and couplers).This creates great cost savings for the provider (more reliable and less costly to operate/troubleshoot).

LINK DIAGRAM OF PON BASED NETWORK

PON TERMINOLOGY

Optical Distribution Network ODN – An ODN realizes the optical transmission from the OLT towards the users and vice versa. It utilizes passive optical components.Optical Line Termination OLT – An OLT is the service provider endpoint of a PON and is placed in a CO or head endOptical Network Termination ONT – An ONT is a device that terminates the PON and presents native service interfaces to the user. An ONT is typically located on the customer’s premises.Optical Network Unit ONU – An ONU is the PON-side half of the ONT, terminating the PON, and may present one or more converged interfaces, such as xDSL or Ethernet, toward the user. An ONU typically requires a separate subscriber unit to provide native user services such as telephony, Ethernet data, or video.

ADVANTAGES OF PON BASED NETWORK

Shared Infrastructure Translates To Lower Cost Per Customer Minimal Number Of Optical TransceiversGreenfield Per-customer Cost Similar To UTP

Passive Splitters Translate To Lower CostCan Be Installed AnywhereNo Power NeededEssentially Unlimited MTBFFiber Data-rates Can Be Upgraded As Technology Improves• Initially 155 Mbps• Then 622 Mbps• Now 1.25 Gbps• Soon 2.5 Gbps And Higher

TYPES OF PONThere are various types of PONs. The general technology is the same. The differences are in the specifications and upper layer protocols.

APON :– ATM based PON uses ATM encapsulation of the transported data.

BPON :– Broadband PON succeeded APON and also uses ATM encapsulation. Supports superior features, higher speeds and was standardized by the ITU-T.

EPON or GE-PON :– Ethernet PON uses Ethernet for data encapsulation. Standardized by the IEEE in mid-2004.

GPON or Giga PON :– Gigabit PON uses a new Generic Encapsulation Method (GEM) transport layer that supports ATM, Ethernet and TDM data transport.

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

YEARS

PON 54MB

APON 155MB

BPON 622MB

EPON 1,25GB

GPON 2,5GB

SPEE

D [

MB

/s]

100

1000

EVOLUTION OF TYPES OF PON

GEPON OVERVIEW

Gigabit Ethernet PON is an attractive FTTH broadband access network technology because it meets the needs of carriers world-wide.

GE-PON has successfully demonstrated this approach and is being deployed in high volume in Asia. It is an access method transported by optical fiber, FTTx is a Point to Multipoint Access Topology in which one central point can reach from 32 to 128 premises. There are only two types of equipments the OLT (central) and the ONT’s (in Customer Premises). It includes all of the ingredients for market success –a consumer base that is eager to adopt a much faster and more comprehensive set of high-speedservices.

FUNDAMENTALS OF GEPON INFRASTRUCTURE

Optical Line

Optical Line Terminal (OLT)• Acts as the central aggregation element.• Located in the Core Data Center.• Replaces multiple L2 switches.• Can aggregate thousands of end users.

OLT

OLT

OLT

FUNDAMENTALS OF GEPON INFRASTRUCTURE

Passive Optical Network (PON)• Completely passive infrastructure• Single fiber (1:32)carries multiple wavelengths• 2.48 Gbps downstream• 1.24 Gbps upstream •Serve Remote Buildings Up to 20 Km

Optical LineOptical splitter

1:32

ONT

ONT

ONT

FUNDAMENTALS OF GEPON INFRASTRUCTURE

Passive Optical Splitter Feeding FDH

•Rack Mount or Cassette versions• Splits single fiber up to 32 ways• Can be located in the IDF/TR, under a raise floor, in a ceiling zone box, or in a manhole.• The further the splitter is extended to the desk,the greater the savings in fiber infrastructure .

Optical LineOptical Splitter

1:32

ONT

ONT

ONT

FUNDAMENTALS OF GEPON INFRASTRUCTURE

Optical Network Terminals (ONT)• Terminates the fiber at the end user• Provides Data, VoIP, IP Video services• Some models also provide native POTS• Desktop and MultiDesk Unit models

Optical Line

Optical Splitter1:32

ONT

ONT

ONT

AFTER

Edge Switches vs. Passive Fiber Splitter

BEFORE

COMPARISON OF GEPON WITH OTHER BROAD BAND ACCESS TECHOLOGIES (DSL,VDSL, CABLE/MODEM)

ADVANTAGES Long-term life expectancy of the fiber infrastructure Lower operating costs through the reduction of “active components” Support for greater distances between equipment nodes Much greater bandwidth DSL-certain megabits per sec FTTH Technology-PON based Network speed ranges from 1.0 to 2.5Gbps

Since GEPON uses only passive components and therefore:

It has low power requirements Less no of technicians Cost savings upto 40-60% Savings mainly result from lower customer contacts associated with service orders and trouble reporting, outside plant operations, central office operations, and network operations. It provides high bandwidth for Hi-Speed Internet Access, Video On Demand, IPTV and Voice Over IP (VoIP) .

Thank You

For Your Time And Consideration